Pipe-wrench



H. CARLSON.

\ PIPE WRENCH.

APPLICATION FILED FEB. I, I918.

1,332, 103. Patented Feb. 24,1920.

HERJEAN'GARIJSON, or WAITE PARK, MINNESOTA.

PIPEWRENGH.

Patented Feb. 24,1920.

Applicationtledl ebruary 1, 1918. Serial No. 214,930.

To aZZ whom i2, may concern:

Be it known that I, HER'MAN CARLsoN', a citizen of the United States; residing" at "Waite Park, in the county of, Stearns and State of Minnesota, have invented certain new and useful Improvements in Pi elVrenches; andI do hereby declare the following to be a full, clear, and eXa'ctdescription of the inventioinsu'ch as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to wrenches and more particularly a) wrenches especially adapted for gripping pipe or other round work.

An object of the invention is the provision of a wrench in which the jaws can be quickly adjusted on the article to be held.

A further object of the invention is the provision of means for quickly releasing the pawl carried by the movable jaw, which detachably engages the shank, so that the movable jaw can be quickly moved along the shank.

A still further object of the invention is the provision of means whereby when force is exerted on the movable jaw, the pawl carried by the jaw is forced into firmer engagement with the shank.

With these and other objects in view the invention consists of the novel construction, arrangement and formation of parts as will be hereinafter specifically described, claimed and illustrated in the accompanying drawings, in which: 7

Figure 1 represents a plan view of the improved pipe wrench,

Fig. 2 represents a side elevation of the wrench showing parts of the same in sections,

Fig. 3 is a cross sectional view taken on the line 3-3 of Fig. 2, and

Fig. 4.- represents a detail sectional view of the pawl.

Referring to the drawing in detail, where in similar reference numerals designate corresponding parts throughout the several views, the numeral l indicates the wrench as an entirety which consists of a shank 2 having a lateral projection at one end thereof forming a stationary jaw 3 and anenlargement on the opposite end forming the handle l. Intermediate the handle and the jaw 3 the side of the shank from which the jaw projects is provided with a rack bar 5.

A slidable jaw 6 of substantially triangular shape is secured by means of rivets 7 between the free ends of the legs 8' of a U shaped member 9 slidably mounted on the shank '2: A u shaped adjusting slide 10 is slida'bly mounted on the shank 2 and receiv es the outer end of the movable jaw 3 and secured to the same by means of a rivet 11 The movable jaw 3 is spaced from the innerfaceof' the shank Q'and isv held in spaced'relation by a; leaf spring12 secured tothe jaw and'bearingagainst the forward po'rtieii of the shank.

A an/1'13 havin its ends reduced as at 14 and secured in the legs of the U-shaped slide 10 has a V-shaped projection 15 adapted to engage in the rack 5 and is held in engagement therewith by a leaf spring 16 engaging the opposite side of the shank and the bight portion of the U-shaped adjusting slide 10 said spring being held in position by means of a rivet 17 extending through the legs of the U-shaped adjusting slide 10.

A pin 18 carried by the adjusting slide 10 engages the face on the opposite side of the shank 2 from the pawl 13 and is out of alinement therewith so that the adjusting slide and jaw can be swung thereon to release the pawl 13 from the rack 5. The pin 18 is ad acent one side of the adjusting slide 10 while the pawl is adjacent the other side.

The stationary jaw 3 and the slidable jaw 6, have their opposed working faces pro vided with detachable jaw faces 19 having serrated surfaces 20 to form pipe engaging means.

In the operation of the improved wrench, the operators thumb is placed upon the bight portion of the adjusting slide 13 over the spring 17, which swings the adjusting slide 10 and the movable jaw 6 and the U- shaped slide 9 on the pin 18, and moves the V-shaped projection 15 of the pawl 13 out of engagement with the rack 5, which allows the movable jaw 3 to be placed in any position on the shank 2. Immediately upon releasing the pressure of the thumb from the adjusting slide 10 the spring 16 will force the pawl 13 in engagement with the a rack and hold the movable jaw firmly in adjusted position.

In practice, I have found that the form of my invention, illustrated in the accompanying drawings and referred to in the above description, as' the preferred embodiment. is the most efficient and practical; yet realizing the conditions concurrent with the adoption of my device Will necessarily vary, I desire to emphasize that various minor changes in details of construction, proportion and arrangement of parts may be resorted to, when required without sacrificing any of the advantages of my invention as set forth.

What is claimed is:'

A wrench including a shank having a right angled stationary jaw at oneend and a handle at the other end, a rack formed on one face of the shank between the jaw and handle, a U-shaped slide mounted on the shank, a triangular shaped movable. jaw secured to the arms of the slide, an adjusting slide on said shank and movable thereon between the U-shaped slide and handle, and having the apex of the movable jaw pivoted thereto, a leaf spring bearing on the mo'v able jaw adjacent its connection to the adjusting slide and having its other end dis-- posed between the arms of the U-shaped slide and against the shank for normally holding the movable jaw in spaced relation to the shank, a pawl carried by the adjusting slide and rearwardly of the connection between .the adjusting slide and the movable jaw, a V-shaped portion formed on said pawl and adapted to engage the rack, a spring bearing against the adjusting slide and the shank at a point in alinement with the pawl, and a fulcrum pin secured to the adjustin slide'and engaging the shank'and arrangec laterally'of the pawl to permit rockingof the adjusting slide to disengage the V-shaped portion from the rack.

In testimony whereof I affix my signature in presence of two witnesses.

HERMAN CAR-LSON.

Witnesses:

Loors HALMER, THERON CARLSON. 

